Before the Popham patch, I had uprooted about 10 thornbushes and placed them inside my claim, but ever since the patch I don't get the option to pick their thorns, ever. Thornbushes in the wild seem to be fine.
Are thorn bushes not supposed to be on claimed land?
I posted this issue in the 'help' section first, and people suggested that thorn bushes might not be getting decay ticks on claimed land, so they never regrow thorns or flowers.